Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Statement of Comprehensive Income [Abstract]
Net income	$ (18.9)	$ 52.3	$ 47.0	$ 85.1
Other comprehensive income (loss), before tax:
Foreign currency translation adjustments	27.2	(13.6)	67.8	2.1
Unrealized gain (loss) on securities	(0.3)	0.1	(0.3)	(0.3)
Unrealized gain (loss) on derivatives	(1.9)	0.5	(1.3)	(1.7)
Unrealized gain on pension plan obligations	8.8	0.2	9.3	0.1
Other comprehensive income (loss), before tax	33.8	(12.8)	75.5	0.2
Income tax (benefit) related to items of other comprehensive income (loss)	(2.4)	(0.8)	(2.6)	0.0
Other comprehensive income (loss), net of tax	31.4	(13.6)	72.9	0.2
Comprehensive income	12.5	38.7	119.9	85.3
Less: Comprehensive income attributable to noncontrolling interests	2.0	1.4	4.7	2.3
Comprehensive income attributable to controlling interests	$ 10.5	$ 37.3	$ 115.2	$ 83.0